66-机器人的运动范围.py

# -*- coding:utf-8 -*-
class Solution:
    def movingCount(self, threshold, rows, cols):
        visited = [False] * (rows * cols)
        count = self.movingCountCore(threshold, rows, cols, 0, 0, visited)
        return count

    def movingCountCore(self, threshold, rows, cols, row, col, visited):
        count = 0
        if self.check(threshold, rows, cols, row, col, visited):
            visited[row * cols + col] = True
            count = 1 + self.movingCountCore(threshold, rows, cols, row-1, col, visited) + \
                        self.movingCountCore(threshold, rows, cols, row+1, col, visited) + \
                        self.movingCountCore(threshold, rows, cols, row, col-1, visited) + \
                        self.movingCountCore(threshold, rows, cols, row, col+1, visited)
        return count

    def check(self, threshold, rows, cols, row, col, visited):
        if row >= 0 and row < rows and col >= 0 and col < cols and self.getDigitSum(row) + self.getDigitSum(col) <= threshold and not visited[row * cols + col]:
            return True
        return False

    def getDigitSum(self, number):
        sum = 0
        while number > 0:
            sum += (number % 10)
            number = number // 10
        return sum